                                     ;:strokeThickness 1
                                     ))
 
-(def left "←")
-(def right "→")
+(defonce left "←")
+(defonce right "→")
 
 
 (defonce scroll-text

;; font preloader channel
;;
(defonce render! (go
                   (<! (events/wait-time 2000))
                   (sprite/set-pos! dummy-text -100000 -10000)
                   (sprite/set-pos! test-text 0 0)
                   (.addChild (-> canvas :layer :ui) dummy-text)

          (sprite/set-pos! right-arrow 200 0.0)
          (sprite/set-scale! left-arrow 2)
          (sprite/set-scale! right-arrow 2)
          (sprite/set-alpha! left-arrow 0.5)
          (sprite/set-alpha! right-arrow 0.5)
          (.addChild (-> canvas :layer :ui) left-arrow)
          (.addChild (-> canvas :layer :ui) right-arrow)
          (go (loop [n 0]
